WO2019181368A1 - Corps de diffusion de lumière, composition pour former un corps de diffusion de lumière, stratifié de type feuille, écran de projection, feuille de diffusion de lumière et dispositif d'éclairage avec amplificateur de lumière intégré - Google Patents

Corps de diffusion de lumière, composition pour former un corps de diffusion de lumière, stratifié de type feuille, écran de projection, feuille de diffusion de lumière et dispositif d'éclairage avec amplificateur de lumière intégré Download PDF

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Publication number
WO2019181368A1
WO2019181368A1 PCT/JP2019/006859 JP2019006859W WO2019181368A1 WO 2019181368 A1 WO2019181368 A1 WO 2019181368A1 JP 2019006859 W JP2019006859 W JP 2019006859W WO 2019181368 A1 WO2019181368 A1 WO 2019181368A1
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Prior art keywords
light
sheet
resin
laminate
scatterer
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PCT/JP2019/006859
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English (en)
Japanese (ja)
Inventor
隆志 北本
拡 織田
ショケット アヒメット
渡辺　浩之
一 斎藤
吉田　武司
Original Assignee
日華化学株式会社
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Application filed by 日華化学株式会社 filed Critical 日華化学株式会社
Priority to CN201980020540.7A priority Critical patent/CN111868576A/zh
Priority to JP2020507458A priority patent/JP7061184B2/ja
Publication of WO2019181368A1 publication Critical patent/WO2019181368A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens

Definitions

  • the present invention relates to a light scatterer, a composition for forming a light scatterer, a sheet-like laminate, a projection screen, a light diffusion sheet, and a lighting device with a built-in light enhancer.
  • Reflective screens which are projected from the projector and projected on the screen and viewed from the projector side, and transmissive screens viewed from the back, are used in various fields such as advertising media for home theater, digital signage, events, etc. Yes.
  • a screen for example, a screen having a layer that contains bubbles in a substrate and reflects incident light is known.
  • Patent Document 1 discloses a technique in which a polyester resin foam sheet containing oriented elliptical bubbles having an average cell diameter of 12 ⁇ m or less is used as a reflective sheet on which an image is projected.
  • Patent Document 2 (A) cyclic olefin-based resin: 90 to 99.9 parts by weight, and (B) organic crosslinked particles: 10 to 0.1 parts by weight (however, the sum of (A) and (B)) There contains 100 parts by weight), total light transmittance of 0% or more, the refractive index n a of the cyclic olefin resin (a), the difference between the refractive index n B of the organic crosslinked particles (B) The absolute value of
  • a screen diffuser is disclosed.
  • Patent Document 3 discloses a screen technology in which internal voids are formed perpendicular to the fiber axis direction using incompatible two-component blend polymer fibers.
  • Patent Document 4 discloses a technique in which a light scattering sheet containing a plurality of bubbles in a resin is applied as a projection screen.
  • Patent Document 5 a film containing a thermoplastic resin having a total light transmittance of 30 to 80% and a total light reflectance of 20 to 70% is capable of exhibiting a function of visually recognizing both reflected light and transmitted light.
  • a possible translucent projection screen technique is disclosed.
  • Patent Document 6 a through hole having an opening diameter of 0.1 to 8 mm that penetrates at a minimum distance of 0.1 to 5 mm between holes is formed in the thickness direction of a film layer containing a thermoplastic resin.
  • a screen technology with a total light transmittance of 30 to 80% and a total light reflectance of 20 to 70% is disclosed.
  • the present invention has been made in view of the above technical problems, and is a light scatterer capable of projecting a clear and bright image, a light scatterer forming composition capable of forming the same, and a light scatterer. It aims at providing the sheet-like laminated body using this, a projection screen, a light-diffusion sheet, and the illuminating device with a built-in light enhancer.
  • the present invention provides a light scatterer in which hollow particles and light scattering particles are dispersed in a resin medium having a refractive index lower than that of the light scattering particles.
  • the light scattering particles are preferably diamond.
  • the pore diameter of the hollow particles is preferably 0.78 ⁇ m or more and 300 ⁇ m or less.
  • the present invention also provides a composition for forming a light scatterer comprising a hollow particle precursor, light scattering particles and a resin, wherein the refractive index of the light scattering particles is higher than the refractive index of the resin.
  • the sheet-like laminate of the present invention includes a base material and a light scattering layer made of the above-described light scatterer provided on the base material.
  • the projection screen of the present invention includes the above-described light scatterer or sheet-like laminate.
  • the light diffusion sheet of the present invention includes a light scattering layer made of the above-described light scatterer.
  • the lighting device with a built-in light enhancer of the present invention includes a light enhancer including the above-described light scatterer or sheet-like laminate and a light source.
  • a light scatterer capable of projecting a clear and bright image
  • a composition for forming a light scatterer capable of forming the same a sheet-shaped laminate using the light scatterer, a projection screen,
  • An illumination device with a light diffusion sheet and a light enhancer can be provided.
  • the light scatterer of this embodiment contains a resin medium, hollow particles dispersed in the resin medium, and light scattering particles dispersed in the resin medium.
  • the refractive index of the resin medium is lower than the refractive index of the light scattering particles.
  • FIG. 1 is a schematic cross-sectional view showing a light scatterer of the present embodiment.
  • a light scatterer 5 shown in FIG. 1 contains a resin medium 3 and hollow particles 1 and light scattering particles 2 dispersed in the resin medium 3.
  • the resin medium contains at least a resin as a constituent component, and the resin functions as, for example, a matrix resin that fixes the hollow particles and the light scattering particles in the light scattering body.
  • the resin medium may be formed from a resin composition containing a resin.
  • the resin examples include thermoplastic resins and thermosetting resins. Specifically, polycarbonate resins, polyurethane resins, polyacryl resins, polystyrene resins, polyolefin resins, vinyl resins, polyester resins, polyether resins, fluororesins, Examples include polysulfone resins, polyether ether ketone resins, polyamide resins, polyimide resins, melamine resins, phenol resins, epoxy resins, silicone resins, cellulose resins, and silicone-modified acrylic resins. When these resins are used, a difference in refractive index from the light scattering particles is easily obtained, and the visibility tends to be further improved.
  • the resin medium preferably contains a polyurethane resin, a polyacrylic resin or a silicone-modified acrylic resin, and more preferably contains a silicone-modified acrylic resin, from the viewpoint of preventing aggregation of the light scattering particles contained in the light scatterer.
  • the resin medium may contain one kind of resin alone, or may contain two or more kinds.
  • the resin composition may contain components other than the resin.
  • other components include anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants, preservatives, light stabilizers, ultraviolet absorbers, antioxidants, polymerization inhibitors, Silicone antifoaming agent, leveling agent, thickener, suspending agent, anti-sagging agent, flame retardant, fluorescent whitening agent, viscosity stabilizer, pH regulator, organic / inorganic pigment / dye additives, additive aids , Antistatic agents, matting agents and the like.
  • the above surfactants are preferably included.
  • anionic surfactants or nonionic surfactants are preferable, alkylbenzene sulfonate, polyoxyethylene alkylphenyl ether sulfate, styrenated phenol alkylene oxide adduct sulfate, alkylnaphthalene sulfonate.
  • anionic surfactants such as naphthalene sulfonic acid formaldehyde condensate salt, alkyl diphenyl ether disulfonate; polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene sorbitan fatty acid partial ester, polyoxyethylene glycerin fatty acid partial ester , Polyoxyethylene glycol fatty acid ester, polyoxyethylene polyoxypropylene block polymer, polyethylene glycol Nonionic surfactants such as (styrylphenyl) ether are more preferred, styrenated phenol alkylene oxide adduct sulfate salts, alkyl naphthalene sulfonate salts or naphthalene sulfonic acid formaldehyde condensate salts are more preferred, and styrenated phenol alkylene oxide adducts. Sulfuric acid ester salts or naphthalenes, al
  • the refractive index of the resin medium is preferably 1.28 or more and less than 1.80, more preferably 1.30 or more and 1.60 or less, and further preferably 1.40 or more and 1.60 or less. .
  • the refractive index indicates a measured value of a sodium lamp at a wavelength of 589.3 nm.
  • the content of the resin medium in the light scatterer is preferably 40 to 95% by mass and more preferably 50 to 90% by mass based on the total amount of the light scatterer from the viewpoint of dispersibility of the particles.
  • the hollow particles have a hollow structure and have pores surrounded by a thin layer.
  • a hollow polymer having pores or the like may be used as it is, or a precursor that forms the hollow particles may be formed by processing such as heating.
  • a treatment such as heating include thermal expansion microcapsules.
  • the pore diameter of the hollow particles is preferably 0.78 to 300 ⁇ m, more preferably 0.9 to 100 ⁇ m, and still more preferably 0.9 to 30 ⁇ m from the viewpoint of visibility.
  • the pore diameter can be measured with a scanning microscope, and the pore diameter (diameter) of each particle is measured for arbitrary 50 or more hollow particles, and they are obtained by arithmetic averaging.
  • the shape of the hole diameter is not a perfect circle in the observation photograph (figure), it is measured as the diameter of the maximum inscribed circle of the cross section of the hole diameter.
  • Examples of the material of the thin layer of the hollow particles include inorganic substances such as silicon oxide, glass, titanium oxide, and aluminum oxide; and organic substances such as phenol resin, epoxy resin, acrylic resin, styrene resin, and urea resin.
  • organic resin such as an acrylic resin, a styrene resin, or a urea resin is preferable, and an acrylic resin or a styrene resin is more preferable.
  • a hollow polymer is a capsule in which a gas such as air is enclosed.
  • the material of the hollow polymer include inorganic substances such as silicon oxide, glass, titanium oxide, and aluminum oxide; organic substances such as phenol resin, epoxy resin, acrylic resin, styrene resin, and urea resin.
  • the thermal expansion microcapsule is a structure in which a heat-expandable gas is encapsulated in the core, and hollow particles having a hollow structure are formed by expansion of the heat-expandable gas encapsulated by heating.
  • the gas inside the core include hydrocarbons having a low boiling point.
  • the material of the thin layer constituting the thermal expansion microcapsule include inorganic substances such as silicon oxide, glass, titanium oxide, and aluminum oxide; organic substances such as phenol resin, epoxy resin, acrylic resin, styrene resin, and urea resin. It is done.
  • the thickness of the thin layer of hollow particles is preferably 1.0 nm to 10 ⁇ m from the viewpoint of visibility and structural stability of the hollow particles.
  • the thickness of the thin layer is preferably 1.0 nm to 1 ⁇ m. It is measured with a scanning electron microscope, and a thin layer of each particle is measured for arbitrary 50 or more hollow particles, and they are obtained by arithmetic averaging. In addition, when the thickness of the thin layer is not constant in the observation photograph (figure), the maximum value and the minimum value of the thin layer are measured and averaged.
  • the content of the hollow particles is preferably 3 to 50% by mass and more preferably 5 to 40% by mass based on the total amount of the light scatterer from the viewpoint of visibility.
  • the light scattering particles may be those having a refractive index higher than that of the resin medium.
  • components constituting the light scattering particles include diamond; zirconium oxide, titanium oxide, barium titanate, strontium titanate, aluminum oxide, zinc oxide, copper oxide, cesium oxide, chromium oxide, niobium oxide, cerium oxide, and oxide.
  • Metal oxides such as indium tin and tantalum oxide; metals such as aluminum, nickel, cobalt, iron, titanium, chromium, zinc, tungsten, mercury, platinum, molybdenum; polycarbonate resin, polyurethane resin, polyacrylic resin, polystyrene resin, polyvinyl Alcohol resin, polyolefin resin, polyvinyl olefin resin, cycloolefin resin, polyester resin, polyether resin, fluorine resin, polysulfone resin, polyether ether ketone resin, polyamide resin, polyimide Resins, melamine resins, phenol resins, epoxy resins, may be silicone resins, cellulose resins, resins such as silicone-modified acrylic resin.
  • those having a refractive index of 1.8 or more are preferred, those having a refractive index of 2.0 or more are more preferred, and those having a refractive index of 2.2 or more are more preferred.
  • the upper limit of a refractive index is not specifically limited, For example, it can be 4.0 or less.
  • Those having a refractive index of 1.8 or more include diamond; zirconium oxide, titanium oxide, barium titanate, strontium titanate, zinc oxide, copper oxide, cesium oxide, chromium oxide, niobium oxide, cerium oxide, indium tin oxide, and oxide.
  • Metal oxides such as tantalum; metals such as nickel, cobalt, iron, titanium, chromium, zinc, tungsten, mercury, platinum, and molybdenum are included.
  • Those having a refractive index of 2.0 or more include diamond; zirconium oxide, titanium oxide, barium titanate, strontium titanate, zinc oxide, copper oxide, cesium oxide, chromium oxide, niobium oxide, cerium oxide, indium tin oxide, and oxide.
  • Metal oxides such as tantalum; metals such as cobalt, iron, titanium, chromium, zinc, tungsten, mercury, platinum, and molybdenum are included.
  • diamond, metal oxide, and metal are preferable from the viewpoint of effectively scattering light, and diamond is more preferable from the viewpoint of visibility and high viewing angle.
  • the light scattering particles may contain these components alone or may contain two or more kinds.
  • diamonds there are many kinds of diamonds depending on the production method and purification method, and any of them can be used.
  • natural diamond synthetic diamond such as high pressure synthetic diamond, detonation synthetic diamond, vapor phase growth diamond and the like can be mentioned.
  • diamond is classified into two types of crystal morphological structure, single crystal diamond and polycrystalline diamond, and can be used alone or in combination.
  • the median diameter of the light scattering particles is preferably 40 nm to 10 ⁇ m, more preferably 70 nm to 1.0 ⁇ m from the viewpoint of visibility.
  • the light scattering particles may be one kind or two or more kinds having different median diameters.
  • the median diameter means a 50% median diameter based on the volume of the particle, and is measured using a laser diffraction scattering type particle size distribution analyzer (for example, LA-960 manufactured by Horiba, Ltd.).
  • the shape of the light scattering particle is not particularly limited.
  • sphere-like, substantially spherical-like, spheroid-like, crush-like, irregular-like, cube-like, rectangular parallelepiped-like, plate-like, pyramid-like, conical-like, flake-like It may be like.
  • a spherical shape, a substantially spherical shape, and a spheroid shape are preferable.
  • the content of the light scattering particles is preferably 1 to 25% by mass, more preferably 2 to 20% by mass, based on the total amount of the light scatterer, from the viewpoint of visibility.
  • the mass ratio of the light scattering particles to the hollow particles is preferably 0.05 or more and 0.80 or less, and more preferably 0.15 or more and 0.60 or less. preferable.
  • the refractive index of the light scattering particles is preferably 0.2 or greater, more preferably 0.4 or greater, and even more preferably 0.6 or greater than the refractive index of the resin medium.
  • the upper limit of the difference in refractive index between the light scattering particles and the resin medium is not particularly limited, but can be, for example, 2 or less.
  • the light scatterer of this embodiment is preferably in the form of a sheet.
  • the thickness is not particularly limited, but is preferably from 0.1 to 500 ⁇ m, more preferably from 0.5 to 80 ⁇ m, from the viewpoint of further improving visibility and economical efficiency.
  • the thickness of the light scatterer is measured using a micrometer (trade name: MDH-25M, manufactured by Mitutoyo Corporation).
  • the light scatterer of this embodiment includes, for example, a step of applying a composition for forming a light scatterer, which will be described later, a step of drying or curing a coating film, and a dried or cured product on a release substrate. And a step of peeling from the material.
  • composition for forming light scatterers contains a hollow particle precursor, light-scattering particle
  • the light scatterer-forming composition of the present embodiment can contain a resin composition.
  • the resin composition As the resin composition, the same resin composition as that for forming the resin medium in the light scatterer of the present embodiment described above can be used.
  • the resin composition includes a polymerizable monomer (for example, a monomer mixture) that can form the resin instead of or in combination with the above-described resin, and, if necessary, a polymerization initiator. It may be.
  • a polymerizable monomer for example, a monomer mixture
  • a polymerization initiator e.g., a polymerization initiator.
  • the resin contained in the resin composition is the above-mentioned resin or a raw material thereof, a light scatterer with excellent visibility is easily obtained because of excellent particle dispersibility.
  • a commercially available solution (resin solution) obtained by diluting or dispersing the above resin with a solvent may be used.
  • Polymerizable monomers include (meth) acrylic acid; (meth) ethyl acrylate, methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isobutyl (meth) acrylate, hydroxyethyl (meth) acrylate, hydroxy (Meth) acrylic acid ester compounds such as propyl (meth) acrylate and 4-hydroxybutyl (meth) acrylate; alkene compounds such as ethylene, propylene, butene, hexene, butadiene and isobrene; halogenated alkenes such as chloroethylene and dichloroethylene Compounds; cycloalkene compounds such as cyclohexene; styrene; epoxy compounds such as ethylene oxide and propylene oxide; and silane compounds such as ⁇ -methacryloxypropylalkoxysilane.
  • the polymerizable monomer may be the above resin having a polymeriz
  • polymerization initiator examples include thermal radical polymerization initiators such as azo compounds and peroxides; thermal cationic polymerization initiators such as benzene acid sulfonic acid ester compounds and alkylsulfonium salts; photopolymerization initiators such as benzoin compounds and acetophenone compounds. Is mentioned.
  • the content of the resin composition as a solid content is preferably 22 to 98.5% by mass and more preferably 30 to 96% by mass based on the total amount of the light scatterer-forming composition from the viewpoint of dispersibility.
  • a hollow particle precursor in the composition for forming a light scatterer a hollow polymer having pores or the like may be used, or a precursor that forms hollow particles by a treatment such as heating may be used.
  • a hollow particle precursor the thing similar to what was demonstrated in the hollow particle of this embodiment mentioned above can be used.
  • the total content of the hollow particle precursor in the light scatterer forming composition is preferably 1.1 to 69.0% by mass based on the total amount of the light scatterer forming composition. 9 to 56.0% by mass is more preferable.
  • the same light scattering particles as those of the above-described embodiment can be used.
  • the total content of light scattering particles in the composition for forming light scatterers is preferably 0.4 to 9.0% by mass, based on the total amount of the composition for forming light scatterers, and 0.7% More preferred is 7.5% by mass.
  • the composition for forming a light scatterer includes, as necessary, inorganic particles other than light scattering particles, organic particles other than light scattering particles, metal particles other than light scattering particles, metal oxide particles other than light scattering particles, a solvent, Polymerization initiator, anionic surfactant, cationic surfactant, nonionic surfactant, amphoteric surfactant, preservative, light stabilizer, UV absorber, antioxidant, polymerization inhibitor, silicone defoamer , Leveling agents, thickeners, anti-settling agents, anti-sagging agents, flame retardants, fluorescent brighteners, viscosity stabilizers, pH regulators, various organic / inorganic pigment / dye additives, additive aids, antistatic agents , Matting agents and the like.
  • the above surfactants are preferably included.
  • anionic surfactants or nonionic surfactants are preferable, alkylbenzene sulfonate, polyoxyethylene alkylphenyl ether sulfate, styrenated phenol alkylene oxide adduct sulfate, alkylnaphthalene sulfonate.
  • anionic surfactants such as naphthalene sulfonic acid formaldehyde condensate salt, alkyl diphenyl ether disulfonate; polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene sorbitan fatty acid partial ester, polyoxyethylene glycerin fatty acid partial ester , Polyoxyethylene glycol fatty acid ester, polyoxyethylene polyoxypropylene block polymer, polyethylene glycol Nonionic surfactants such as (styrylphenyl) ether are more preferred, styrenated phenol alkylene oxide adduct sulfate salts, alkyl naphthalene sulfonate salts or naphthalene sulfonic acid formaldehyde condensate salts are more preferred, and styrenated phenol alkylene oxide adducts. Sulfuric acid ester salts or naphthalenes, al
  • the solvent examples include aliphatic hydrocarbon solvents such as hexane, cyclohexane, methylcyclohexane, ethylcyclohexane, heptane, nonane, octane, isooctane, and decane; aromatic hydrocarbon solvents such as benzene, toluene, xylene, cumene, and ethylbenzene.
  • aliphatic hydrocarbon solvents such as hexane, cyclohexane, methylcyclohexane, ethylcyclohexane, heptane, nonane, octane, isooctane, and decane
  • aromatic hydrocarbon solvents such as benzene, toluene, xylene, cumene, and ethylbenzene.
  • Solvents diethyl ether, diisopropyl ether, methyl tert-butyl ether, methyl cellosolve, cellosolve, butyl cellosolve, methyl carbitol, carbitol, butyl carbitol, diethyl carbitol, propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, tetrahydrofuran, 1 Ether solvents such as 1,3-dioxane, 1,4-dioxane; dimethyl ketone, ethyl methyl ketone, diethyl ketone, methyl ester Ketone solvents such as butyl ketone, diisopropyl ketone, diisobutyl ketone and cyclohexanone; carbonate solvents such as dimethyl carbonate, diethyl carbonate and ethylene carbonate; methyl alcohol, ethyl alcohol, isopropyl alcohol, n-butyl
  • the method for producing the composition for forming a light scatterer is not particularly limited, and examples thereof include a method in which a hollow particle precursor and light scattering particles are added to a resin composition and dispersed.
  • Examples of the method for dispersing the hollow particle precursor and the light scattering particles include conventionally known mixing and dispersion methods. In order to more reliably disperse the hollow particle precursor and the light scattering particles, it is preferable to perform a dispersion treatment using a disperser.
  • Dispersers include, for example, mixers such as dispersers, homomixers, planetary mixers (PRIMIX “Filmix”), revolving mixers (Shinky “Awatori Netaro”, etc.); homogenizers (M Technique Co., Ltd.) "Clairemix”); paint conditioner (manufactured by Red Devil), ball mill, sand mill (such as “Dynomill” manufactured by Shinmaru Enterprises), attritor, pearl mill (such as “DCP mill” manufactured by Eirich), coball mill, etc.
  • mixers such as dispersers, homomixers, planetary mixers (PRIMIX “Filmix”), revolving mixers (Shinky “Awatori Netaro”, etc.); homogenizers (M Technique Co., Ltd.) "Clairemix”); paint conditioner (manufactured by Red Devil), ball mill, sand mill (such as “Dynomill” manufactured by Shinmaru Enterprises), attritor, pearl mill (such as “D
  • Media type disperser Wet jet mill (Genus PY, Genus, Starburst, Nanomizer, Nanomizer, etc.); Medialess disperser (Clea SS-5, M Technique) "" MICROS “manufactured by Nara Machinery Co., Ltd.); Roll mill, and the like.
  • FIGS. 2 and 3 are schematic cross-sectional views showing an embodiment of a sheet-like laminate.
  • the sheet-like laminate 6 of the present embodiment shown in FIGS. 2 and 3 includes a base material 4 and a light scattering layer made of the light scatterer 5 of the present embodiment provided on the base material 4.
  • FIG. 2 is a diagram showing a case where the particle diameters of the hollow particles 1 and the light scattering particles 2 are smaller than the thickness of the light scattering body 5, and FIG. It is a figure which shows the case where it is larger than thickness.
  • the hollow particles 1 and / or the light scattering particles 2 may protrude out of the resin medium 3.
  • the substrate is not particularly limited as long as it does not impair the optical properties of the sheet-like laminate.
  • glass such as soda-lime glass, lead glass, borosilicate glass; polyester resin , Polycarbonate resin, polyolefin resin, polyacrylic resin, cellulose resin, polyvinyl resin, etc .; quartz; aluminum oxide, titanium oxide, niobium oxide, tantalum oxide, indium tin oxide, zinc oxide, zirconium oxide, cerium oxide
  • Metal oxides such as steel, carbon steel, chromium-molybdenum steel, alloys such as aluminum alloys, stainless alloys, copper alloys, titanium alloys; gold, silver, copper, zinc, iron, aluminum, platinum, lead, palladium, etc.
  • Plant fibers such as cotton and hemp
  • animals such as silk, wool, alpaca, Angola, cashmere, mohair Wei
  • rayon, polyacetates, Promix nylon, polyester, polyacrylic, polyvinyl chloride, synthetic fibers such as polyurethane
  • glass fibers metal fibers, inorganic fibers such as carbon fibers.
  • a transparent substrate When used as a transmission screen, a transparent substrate is preferable.
  • the transparent substrate include glass and plastic.
  • the thickness of the substrate is not particularly limited, but is preferably 1 ⁇ m to 50 mm, more preferably 20 ⁇ m to 30 mm from the viewpoint of strength and economy.
  • the light scattering layer is made of the light scatterer of the present embodiment described above, and can be formed using the light scatterer forming composition.
  • the thickness of the light scattering layer is preferably from 0.1 to 500 ⁇ m, more preferably from 0.5 to 80 ⁇ m, from the viewpoint of excellent visibility and economy.
  • the thickness of the light scattering layer is measured using a micrometer (trade name: MDH-25M, manufactured by Mitutoyo Corporation).
  • a known hard coat layer, antistatic layer, anti-fingerprint film layer, or matte layer for increasing the strength of the film can be provided on at least one outermost surface.
  • An adhesive layer may be provided by applying an adhesive to the substrate side of the sheet-like laminate.
  • the sheet-like laminate of the present embodiment can be used in either a reflection type or a transmission type when projecting a projection image.
  • the substrate is not particularly limited as long as the optical properties are not impaired.
  • the sheet-like laminate of the present embodiment is added with an appropriate amount of a flame retardant such as antimony trioxide, antimony pentoxide, aluminum hydroxide, magnesium hydroxide, melamine cyanurate, best boron, or sofa to the light scatterer forming composition.
  • a flame retardant such as antimony trioxide, antimony pentoxide, aluminum hydroxide, magnesium hydroxide, melamine cyanurate, best boron, or sofa to the light scatterer forming composition.
  • a flame retardant such as antimony trioxide, antimony pentoxide, aluminum hydroxide, magnesium hydroxide, melamine cyanurate, best boron, or sofa to the light scatterer forming composition.
  • a flame retardant such as antimony trioxide, antimony pentoxide, aluminum hydroxide, magnesium hydroxide, melamine cyanurate, best boron, or sofa
  • the sheet-like laminate of the present embodiment includes, for example, a step of applying a light scatterer-forming composition containing a resin composition, a hollow particle precursor, and light scattering particles on a substrate, and drying or coating the coating film. And a step of curing.
  • Another method includes a method of laminating a sheet-like light scatterer on a substrate.
  • the application method of the composition for forming a light scatterer is not particularly limited, and can be appropriately selected according to the shape of the release substrate or the substrate.
  • a slide bead method, a slide curtain method, an extrusion method, a slot Examples include a die method, a gravure roll method, an air knife method, a blade coating method, and a rod bar coating method.
  • a method of heating with a hot air dryer or an infrared dryer can be used.
  • the resin composition is a water-based emulsion
  • the water dispersed in the emulsion can be heated with a hot air dryer, an infrared dryer or the like to evaporate the water contained in the coating film and cure the resin.
  • the resin composition contains a monomer and a polymerization initiator
  • ultraviolet rays electron beams, infrared rays, visible rays, X-rays, ⁇
  • a coating film can be hardened by irradiating active energy rays such as rays, ⁇ rays, heavy particle rays and the like to polymerize and polymerize monomers.
  • the thickness of the coating film of the composition for forming a light scatterer is such that the thickness of the light scatterer after drying (for example, the thickness of the light scatterer 5) is 0.1 to
  • the thickness is preferably 500 ⁇ m, and more preferably 0.5 to 80 ⁇ m.
  • the sheet-like light scatterer can be obtained by peeling the light scatterer from the release substrate.
  • peeling does not specifically limit as a method to peel from a peeling base material, For example, seal peeling, physical peeling, release agent addition, etc. are mentioned.
  • the projection screen of this embodiment includes the light scatterer of this embodiment described above or the sheet-like laminate of this embodiment described above.
  • the projection screen of this embodiment may be a transmissive screen that can recognize an image from the side that is transmissive to the light source, or may be a reflective screen that can recognize the image from the side that is reflected to the light source.
  • the projection screen of the present embodiment can be composed of a light scatterer alone or a sheet-like laminate alone. However, when projecting an image by a projection source, the light scatterer or the sheet-like laminate is placed in space. It preferably has a function capable of being fixed.
  • a fixing bracket can be attached to the entire upper part or a part of the sheet-like laminate. Further, it is preferable that the fixing function is such that the sheet-like laminate can be kept flat without bending so that the image is not blurred or distorted.
  • the projection screen of the present embodiment preferably has a storage means that can store the sheet-like laminate in a roll shape.
  • An example of the storage means is a winding type storage device.
  • the image projecting portion of the sheet-like laminate can be protected, and storage properties, storage properties, portability, transportability, and the like can be improved.
  • the projection screen of the present embodiment may have a heavy object at the bottom of the sheet-like laminate in order to suppress the occurrence of deflection or distortion of the projection surface due to wind or vibration.
  • a force of 1 kg to 500 kg as a heavy object it becomes easy to maintain the flatness of the image projection surface and eliminate the distortion of the projection image.
  • the projection screen of the present embodiment may be one in which a light scatterer or a sheet-like laminate is provided on a substrate having a curved surface.
  • the light scatterer or the sheet-like laminate may be adhered or adhered to the curved substrate, and the light scatterer is formed by directly applying the above-described composition for forming a light scatterer to the curved substrate surface. May be.
  • the light scatterer or sheet-like laminate of the present embodiment can be used as a light diffusion sheet that can weaken the directivity of light.
  • the light-scattering body or sheet-like laminated body of this embodiment can be used as a composite light-scattering sheet which further amplifies a light-scattering effect by forming on another light-diffusion sheet.
  • a composite light scattering sheet which further amplifies a light-scattering effect by forming on another light-diffusion sheet.
  • Illumination light can be uniformly scattered indoors and outdoors.
  • the light enhancer for illumination can be configured using the light scatterer or sheet-like laminate of the present embodiment.
  • a light scatterer or a sheet-like laminate as a light enhancer for illumination, light can be efficiently scattered with a very simple structure.
  • the sheet-like laminate or projection screen of this embodiment can also be used as a vehicle member.
  • a sheet-like laminate or a projection screen can be adhered to the surfaces of the side and rear windows to give an image display function to the side and rear windows.
  • the sheet-like laminate or projection screen of this embodiment can also be used for building members.
  • a sheet-like laminate or a projection screen can be pasted on a transparent window material, and an image can be projected by a projector, which can be used as a store advertisement or information provision.
  • a material and a base material for preparing a composition for forming a light scatterer were prepared as follows.
  • Acrylic resin composition EK-61 (manufactured by Seiden Chemical Co., Ltd., non-volatile component: 39.2%), refractive index: 1.49.
  • Urethane resin composition Evaphanol HA-170 (manufactured by Nikka Chemical Co., Ltd., non-volatile content: 36.5% by mass, refractive index: 1.50.
  • Silicone-modified acrylic resin MX-9010 (Mitsubishi Chemical Corporation, non-volatile component: 49.6%), refractive index: 1.45 [Hollow particle precursor] Hollow polymer: Ropaque SN-1055 (manufactured by Dow Coating Materials, nonvolatile component: 26.5%), median diameter: 1.7 ⁇ m, thin layer thickness: 350 nm, material: styrene resin, thermal expansion microcapsule: Expandel053 -40 (Nippon Philite, non-volatile component: 100%), median diameter: 14 ⁇ m, material: acrylic resin [light scattering particles] Diamond 1: (RZ, single crystal diamond, median diameter: 200 nm, refractive index: 2.42) Diamond 2: (RZ, polycrystalline diamond, median diameter: 500 nm, refractive index: 2.42) Titanium oxide: (manufactured by Sakai Chemical Industry Co., Ltd., model number: SA-1, median diameter: 150 nm, refractive index: 2.52) [S
  • composition 1 for forming light scatterers Preparation of composition 1 for forming light scatterers
  • a homomixer ROBOMICS (fmodel), manufactured by Primix.
  • filtration was carried out with a # 2000 gutter to obtain a diamond dispersed resin composition. No agglomerates were found in the cocoons.
  • 22.0 g of a hollow polymer was added to the diamond dispersion resin composition, and an ultrasonic dispersion treatment was performed for 5 minutes using an ultrasonic dispersion apparatus (manufactured by ASONE). As a result, a composition 1 for forming a light scatterer was obtained.
  • composition 2 for forming light scatterers Light scattering was performed in the same manner as in the composition 1 for forming a light scatterer, except that 1.7 g of diamond 1, 85.8 g of EK-61, and 12.5 g of hollow polymer were added to a stainless steel pot. Body forming composition 2 was prepared. In addition, the aggregate was not seen in the cocoon.
  • composition 4 for forming light scatterers Composition 1 for forming a light scatterer, except that 1.5 g of diamond 1, 0.2 g of diamond 2, 76.5 g of EK-61, and 22.0 g of hollow polymer were added to a stainless steel pot. In the same manner as above, a light scatterer-forming composition 4 was prepared. In addition, the aggregate was not seen in the cocoon.
  • composition 5 for forming light scatterers A composition 1 for forming a light scatterer, except that 1.8 g of diamond 1, 91.4 g of EK-61, and 6.8 g of thermally expanded microcapsules were added to the stainless steel pot instead of hollow polymer. In the same manner as above, a composition 5 for forming a light scatterer was prepared. In addition, the aggregate was not seen in the cocoon.
  • composition 7 (Preparation of light scatterer-forming composition 7) Same as composition 1 for light scatterer formation, except that titanium oxide was added to the stainless steel pot in place of diamond 1 so that 1.5 g of titanium oxide, 76.5 g of EK-61, and 22.0 g of hollow polymer were added. Thus, a light scatterer-forming composition 7 was prepared. In addition, the aggregate was not seen in the cocoon.
  • the light scatterer was the same as the light scatterer-forming composition 1 except that diamond 1 was not added to the stainless steel pot, and EK-61 was added to 63.0 g and the hollow polymer to 37.0 g.
  • a forming composition 9 was prepared. In addition, the aggregate was not seen in the cocoon.
  • a light scatterer was prepared in the same manner as in the composition 1 for forming a light scatterer, except that diamond 1 was added to a stainless steel pot to 1.7 g and EK-61 to 98.3 g, and a hollow polymer was not added.
  • a forming composition 10 was prepared. In addition, the aggregate was not seen in the cocoon.
  • compositions of the light scatterer forming compositions 1 to 14 are summarized in Table 1.
  • Example 1 ⁇ Production of sheet-like laminate> (Example 1) On one side of the substrate, the light-scattering body composition 1 using a slide bead coating apparatus to a solid concentration of 40 g / m 2 (the Mitsui electrical Seiki tabletop coater, TC-3 type) coating did. Then, it put into 100 degreeC oven for 2 minutes, it was made to dry, and the sheet-like laminated body in which the light-scattering layer which consists of a light-scattering body was provided on the base material was produced.
  • the light scattering layer had a thickness of 14.2 ⁇ m, the pore diameter of the hollow particles was 1.0 ⁇ m, and the thickness of the thin layer of the hollow particles was 0.35 ⁇ m.
  • the hollow diameter of the hollow particles and the thickness of the thin layer are arbitrarily set by the scanning electron microscope (manufactured by JEOL Ltd., JSM-6010LA) so that 50 to less than 60 hollow particles enter the field of view.
  • the projected range was calculated based on the captured image data.
  • Image data is taken into the image analysis software “Particle Analysis” (manufactured by Nippon Steel & Sumikin Technology Co., Ltd.), and the average value when measured as the diameter of the largest inscribed circle of the cross section of the hole diameter of 50 hollow particles Calculated as Moreover, the thickness of the thin layer in 50 hollow particles was measured, and those arithmetic average was made into the thickness of the thin layer. In the image data, when the thickness of the thin layer was not constant, the maximum value and the minimum value of the thickness of the thin layer were measured and averaged.
  • Example 2 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer-forming composition was applied so that the solid concentration was 60 g / m 2 .
  • the thickness of the light scattering layer was 19.6 ⁇ m
  • the pore diameter of the hollow particles was 1.0 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.35 ⁇ m.
  • Example 3 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer-forming composition was applied so that the solid content concentration was 80 g / m 2 .
  • the thickness of the light scattering layer was 28.1 ⁇ m, the pore diameter of the hollow particles was 1.0 ⁇ m, and the thickness of the thin layer of the hollow particles was 0.35 ⁇ m.
  • Example 4 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer forming composition 2 was used instead of the light scatterer forming composition 1.
  • the thickness of the light scattering layer was 13.8 ⁇ m
  • the pore diameter of the hollow particles was 1.0 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.35 ⁇ m.
  • Example 5 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer forming composition 3 was used in place of the light scatterer forming composition 1.
  • the thickness of the light scattering layer was 14.0 ⁇ m
  • the pore diameter of the hollow particles was 1.0 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.35 ⁇ m.
  • Example 6 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer forming composition 4 was used in place of the light scatterer forming composition 1.
  • the thickness of the light scattering layer was 14.1 ⁇ m
  • the pore diameter of the hollow particles was 1.0 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.35 ⁇ m.
  • Example 7 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer-forming composition 5 was used in place of the light scatterer-forming composition 1.
  • the thickness of the light scattering layer was 27.4 ⁇ m
  • the pore diameter of the hollow particles was 26.6 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.40 ⁇ m.
  • Example 8 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer forming composition 6 was used in place of the light scatterer forming composition 1.
  • the thickness of the light scattering layer was 27.0 ⁇ m
  • the pore diameter of the hollow particles was 26.2 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.40 ⁇ m.
  • Example 9 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer forming composition 7 was used in place of the light scatterer forming composition 1.
  • the thickness of the light scattering layer was 14.3 ⁇ m
  • the pore diameter of the hollow particles was 1.0 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.35 ⁇ m.
  • Example 10 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer forming composition 8 was used in place of the light scatterer forming composition 1.
  • the thickness of the light scattering layer was 13.8 ⁇ m
  • the pore diameter of the hollow particles was 1.0 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.35 ⁇ m.
  • Example 1 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer forming composition 9 was used instead of the light scatterer forming composition 1.
  • the thickness of the light scattering layer was 14.1 ⁇ m
  • the pore diameter of the hollow particles was 1.0 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.35 ⁇ m.
  • Example 2 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer-forming composition 10 was used instead of the light scatterer-forming composition 1.
  • the thickness of the light scatterer was 14.3 ⁇ m.
  • Example 17 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer forming composition 11 was used in place of the light scatterer forming composition 1.
  • the thickness of the light scattering layer was 14.2 ⁇ m
  • the pore diameter of the hollow particles was 1.0 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.40 ⁇ m.
  • Example 18 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer-forming composition 12 was used in place of the light scatterer-forming composition 1.
  • the thickness of the light scattering layer was 14.1 ⁇ m
  • the pore diameter of the hollow particles was 1.0 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.40 ⁇ m.
  • Example 19 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer forming composition 13 was used in place of the light scatterer forming composition 1.
  • the thickness of the light scattering layer was 13.8 ⁇ m
  • the pore diameter of the hollow particles was 1.0 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.40 ⁇ m.
  • Example 20 A sheet-like laminate was produced in the same manner as in Example 1 except that the light scatterer forming composition 14 was used instead of the light scatterer forming composition 1.
  • the thickness of the light scattering layer was 14.0 ⁇ m
  • the pore diameter of the hollow particles was 1.0 ⁇ m
  • the thickness of the thin layer of the hollow particles was 0.40 ⁇ m.
  • the brightness of the sheet-like laminate was measured by the following procedure using a variable angle photometer (Nippon Denshoku Industries Co., Ltd., product number: GC5000).
  • the incident angle of the light source was set to 20 degrees, and the transmitted light intensity in the 20-degree direction when nothing was placed on the measurement stage was set to 100.
  • the sheet-like laminate was placed on the measurement stage, and the L * value of transmission at 0 degree was measured while maintaining the incident angle of the light source at 20 degrees, and this was used as the brightness.
  • the L * value was 1.30 or more as acceptable.
  • the brightness of the sheet-like laminate was measured by the following procedure using a variable angle photometer (Nippon Denshoku Industries Co., Ltd., product number: GC5000).
  • the incident angle of the light source was set to 20 degrees, and the reflected light intensity in the 20-degree direction with a standard white plate placed on the measurement stage was set to 100.
  • the sheet-like laminate was placed on the measurement stage instead of the standard white plate, and the L * value of reflection at 0 degree was measured with the incident angle of the light source kept at 20 degrees, and this was taken as the brightness.
  • the L * value was 10 or more.
  • the sheet-like laminates of Examples 1 to 10 and 17 to 20 are shown to have high image brightness in both the reflection mode and the transmission mode, and are useful as projection screens for projectors. It turns out that it is. Further, it was found that the sheet-like laminates of Examples 1 to 10 and 17 to 20 can obtain high image quality in both the reflection mode and the transmission mode. Furthermore, the sheet-like laminates of Examples 17 to 20 can suppress the aggregation of light scatterer particles, have an excellent appearance of the sheet-like laminate, and obtain high image quality even when an image is projected. I found out that
  • Example 11 curved transparent screen
  • Slight tackiness was imparted by applying an adhesive (trade name “Gel Poly”) to the base material surface of each sheet-like laminate obtained in Examples 1 to 10.
  • a sheet-like laminate was attached to a transparent acrylic semi-cylinder (thickness 5 mm, diameter 500 mm, fan angle 45 °, length 400 mm) so that there were no bubbles at the interface, and a curved transparent screen was produced.
  • the curved transparent screen could be used as a transmissive transparent screen or a reflective transparent screen.
  • Example 12 Light diffusion sheet
  • the performance of the sheet-like laminate 6 was evaluated using the evaluation apparatus shown in FIG. 4 includes a light source 10, a transparent optical stage 11 arranged perpendicular to the light emission optical axis of the light source 10, and an optical goniometer 12 having a photodetector 13.
  • the substrate 4 side of the sheet-like laminate 6 is fixed to the transparent optical stage 11, and light is irradiated from the light scatterer 5 side of the sheet-like laminate 6 from the light source 10 and transmitted through the sheet-like laminate 6. Measurement was performed by detecting the intensity of light with the photodetector 13. The result is shown in FIG.
  • a simple LED illumination tester using white LEDs (manufactured by OptoSupply, Xeon3Emitter, maximum power consumption 3.2 W, maximum applied voltage 5 V, maximum forward current 800 mA, color temperature 6,500 K) is used.
  • the sheet-like laminate was evaluated as a light diffusion sheet.
  • the sheet-like laminate of Example 2 is fixed on the substrate side on a transparent stage arranged perpendicular to the light emission optical axis of the LED light source and irradiated with light.
  • the distribution of light scattered on the sheet-shaped laminate is measured with a photodetector (Hamamatsu Photonics PIN Photo-Fidel S1223, aperture diameter 1 mm) installed in an optical goniometer (Nikka Densaku Co., Ltd.).
  • a photodetector Hamamatsu Photonics PIN Photo-Fidel S1223, aperture diameter 1 mm
  • an optical goniometer Nikka Densaku Co., Ltd.
  • a sine wave of 1,000 Hz was applied to the light source, and the output signal of the photodetector was detected by using a lock-in amplifier (LI5640 manufactured by NF Circuit Block) to detect the signal from which noise was removed. .
  • Example 13 Composite light diffusion sheet
  • a composite light diffusion sheet 15 in which a light scatterer 5 was formed on a commercially available light diffusion sheet 14 was produced.
  • the light scatterer-forming composition 2 was applied to one side of a light diffusion sheet (Scotchical light diffusion film, manufactured by 3M). Coating was performed in the same manner as in Example 1 except that the thickness of the light scattering layer was 2.3 ⁇ m, and a composite light diffusion sheet was produced. According to such a composite light diffusion sheet, the light scattering high rate can be increased.
  • Example 14 Composite light diffusion sheet
  • Example 15 Composite light diffusion sheet
  • a composite light diffusing sheet was produced in the same manner as in Example 13 except that the thickness of the light scattering layer was 8.3 ⁇ m.
  • Example 5 The scotchical light diffusion film (manufactured by 3M) used in Example 13 was evaluated as a composite light diffusion sheet in which no light scattering layer was formed. was used as a comparative example.
  • Light diffusivity is one of the measurement methods defined in German Industrial Standard DIN 5036. Specifically, light is incident on one surface of a resin base material at an incident angle of 0 degrees, and light emitted from the opposite surface is measured. The luminance L ( ⁇ ) in the direction of the emission angle ⁇ ( ⁇ 5 °, ⁇ 20 °, ⁇ 70 °) is measured, and the measured value is substituted into the following formula (1) to calculate the diffusivity of the resin base material. The higher the value, the wider the light diffuses.
  • Light diffusivity D ⁇ (B 70 + B 20 ) / 2> / B 5 ⁇ 100 (1)
  • Example 16 Enhancer for lighting
  • the illuminating device 23 includes a box-shaped white acrylic plate 20, a transparent acrylic plate 21 covering the opening, and a cylindrical LED light source 22 installed inside these. Evaluation was made by comparing the case where the sheet-like laminate 6 was pasted on the entire inner surface of the white acrylic plate with the case where the sheet-like laminate 6 was not pasted. Specifically, the sheet-shaped laminate of Example 2 was attached to the entire inner surface (made of a white acrylic plate) of a lighting device having a length of 20 cm, a width of 40 cm, and a depth of 20 cm with an adhesive.
  • a straight tube LED (RL-BAR30DLC, manufactured by Root Earl Co., Ltd.) was used as the light source, and the opening was closed with a transparent acrylic plate.
  • the illuminance was measured with an illuminometer (manufactured by Hioki Electric Co., Ltd., FT3424) at a position 30 cm from the projection surface of the lighting device, when the sheet-like laminate was attached and when it was not attached. The results are shown in Table 4.
  • Example 2 As is clear from Table 4, it was found that the sheet-like laminate of Example 2 was able to obtain an effect of increasing the illuminance by about 1.61 times as a light enhancer for illumination.
  • SYMBOLS 1 Hollow particle, 2 ... Light scattering particle, 3 ... Resin medium, 4 ... Base material, 5 ... Light scattering body, 6 ... Sheet-like laminated body, 10 ... Light source, 11 ... Transparent optical stage, 12 ... Optical goniometer, DESCRIPTION OF SYMBOLS 13 ... Photodetector, 14 ... Light diffusion sheet, 15 ... Composite light diffusion sheet, 20 ... White acrylic board, 21 ... Transparent acrylic board, 22 ... Cylindrical LED light source.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

Un corps de diffusion de lumière (5) selon la présente invention comprend : une résine contenant une masse de résine (3); ainsi que des particules creuses (1) et des particules de diffusion de lumière (2) qui sont dispersées dans la masse de résine (3). L'indice de diffraction de la masse de résine (3) est inférieur à l'indice de diffraction des particules de diffusion de lumière (2).
PCT/JP2019/006859 2018-03-23 2019-02-22 Corps de diffusion de lumière, composition pour former un corps de diffusion de lumière, stratifié de type feuille, écran de projection, feuille de diffusion de lumière et dispositif d'éclairage avec amplificateur de lumière intégré WO2019181368A1 (fr)

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JP2020507458A JP7061184B2 (ja) 2018-03-23 2019-02-22 光散乱体、光散乱体形成用組成物、シート状積層体、投影スクリーン、光拡散シート及び光エンハンサー内蔵照明装置

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WO2023085240A1 (fr) * 2021-11-09 2023-05-19 リンテック株式会社 Film de revêtement dur pour écran de projection et écran de projection

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WO2023085240A1 (fr) * 2021-11-09 2023-05-19 リンテック株式会社 Film de revêtement dur pour écran de projection et écran de projection

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